/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:22:22,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:22:22,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:22:22,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:22:22,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:22:22,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:22:22,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:22:22,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:22:22,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:22:22,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:22:22,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:22:22,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:22:22,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:22:22,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:22:22,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:22:22,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:22:22,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:22:22,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:22:22,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:22:22,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:22:22,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:22:22,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:22:22,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:22:22,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:22:22,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:22:22,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:22:22,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:22:22,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:22:22,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:22:22,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:22:22,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:22:22,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:22:22,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:22:22,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:22:22,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:22:22,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:22:22,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:22:22,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:22:22,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:22:22,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:22:22,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:22:22,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:22:22,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:22:22,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:22:22,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:22:22,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:22:22,846 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:22:22,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:22:22,846 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:22:22,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:22:22,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:22:22,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:22:22,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:22:22,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:22:22,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:22:22,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:22:22,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:22:22,848 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:22:22,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:22:22,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:22:22,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:22:22,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:22:22,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:22:22,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:22,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:22:22,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:22:22,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:22:22,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:22:22,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:22:22,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:22:22,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:22:22,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:22:23,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:22:23,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:22:23,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:22:23,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:22:23,186 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:22:23,187 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 21:22:23,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff5093cff/f6ea08d1602941709cf42821598e16de/FLAG238427801 [2020-08-21 21:22:23,831 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:22:23,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ntdrivers-simplified/kbfiltr_simpl2.cil-2.c [2020-08-21 21:22:23,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff5093cff/f6ea08d1602941709cf42821598e16de/FLAG238427801 [2020-08-21 21:22:24,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff5093cff/f6ea08d1602941709cf42821598e16de [2020-08-21 21:22:24,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:22:24,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:22:24,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:24,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:22:24,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:22:24,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38567abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24, skipping insertion in model container [2020-08-21 21:22:24,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:22:24,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:22:24,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:24,643 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:22:24,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:24,737 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:22:24,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24 WrapperNode [2020-08-21 21:22:24,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:24,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:22:24,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:22:24,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:22:24,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... [2020-08-21 21:22:24,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:22:24,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:22:24,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:22:24,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:22:24,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:24,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:22:24,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:22:24,898 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2020-08-21 21:22:24,899 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2020-08-21 21:22:24,899 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_PnP [2020-08-21 21:22:24,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:22:24,899 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2020-08-21 21:22:24,899 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2020-08-21 21:22:24,900 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2020-08-21 21:22:24,900 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2020-08-21 21:22:24,900 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2020-08-21 21:22:24,900 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2020-08-21 21:22:24,900 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2020-08-21 21:22:24,900 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2020-08-21 21:22:24,901 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Power [2020-08-21 21:22:24,901 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2020-08-21 21:22:24,901 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_InternIoCtl [2020-08-21 21:22:24,901 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2020-08-21 21:22:24,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:22:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 21:22:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:22:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-21 21:22:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_PnP [2020-08-21 21:22:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2020-08-21 21:22:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2020-08-21 21:22:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2020-08-21 21:22:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2020-08-21 21:22:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2020-08-21 21:22:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2020-08-21 21:22:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Power [2020-08-21 21:22:24,903 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2020-08-21 21:22:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_InternIoCtl [2020-08-21 21:22:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2020-08-21 21:22:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2020-08-21 21:22:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2020-08-21 21:22:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2020-08-21 21:22:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:22:24,904 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2020-08-21 21:22:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:22:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:22:25,159 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 21:22:25,228 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-08-21 21:22:25,228 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-08-21 21:22:25,261 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 21:22:25,386 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2020-08-21 21:22:25,386 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2020-08-21 21:22:25,389 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 21:22:25,455 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 21:22:25,456 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 21:22:25,470 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 21:22:25,523 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2020-08-21 21:22:25,524 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2020-08-21 21:22:25,621 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 21:22:25,640 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2020-08-21 21:22:25,640 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2020-08-21 21:22:25,664 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-21 21:22:25,759 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume false; [2020-08-21 21:22:25,759 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume !false; [2020-08-21 21:22:25,777 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:22:25,778 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:22:25,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:25 BoogieIcfgContainer [2020-08-21 21:22:25,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:22:25,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:22:25,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:22:25,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:22:25,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:22:24" (1/3) ... [2020-08-21 21:22:25,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4857f83a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:25, skipping insertion in model container [2020-08-21 21:22:25,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:24" (2/3) ... [2020-08-21 21:22:25,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4857f83a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:25, skipping insertion in model container [2020-08-21 21:22:25,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:25" (3/3) ... [2020-08-21 21:22:25,792 INFO L109 eAbstractionObserver]: Analyzing ICFG kbfiltr_simpl2.cil-2.c [2020-08-21 21:22:25,803 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:22:25,812 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:22:25,826 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:22:25,853 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:22:25,853 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:22:25,853 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:22:25,854 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:22:25,854 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:22:25,854 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:22:25,854 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:22:25,855 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:22:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2020-08-21 21:22:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:22:25,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:25,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:25,890 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1129426977, now seen corresponding path program 1 times [2020-08-21 21:22:25,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:25,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136085737] [2020-08-21 21:22:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:26,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:26,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:26,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136085737] [2020-08-21 21:22:26,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:26,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:22:26,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640043270] [2020-08-21 21:22:26,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:22:26,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:26,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:22:26,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:22:26,403 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 5 states. [2020-08-21 21:22:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:27,445 INFO L93 Difference]: Finished difference Result 418 states and 629 transitions. [2020-08-21 21:22:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:22:27,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 21:22:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:27,465 INFO L225 Difference]: With dead ends: 418 [2020-08-21 21:22:27,465 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 21:22:27,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:22:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 21:22:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2020-08-21 21:22:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-21 21:22:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2020-08-21 21:22:27,555 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 20 [2020-08-21 21:22:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:27,556 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2020-08-21 21:22:27,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:22:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2020-08-21 21:22:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 21:22:27,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:27,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:27,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:22:27,559 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1811427322, now seen corresponding path program 1 times [2020-08-21 21:22:27,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:27,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639137327] [2020-08-21 21:22:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:27,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:27,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:27,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:27,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639137327] [2020-08-21 21:22:27,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:27,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:22:27,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899364972] [2020-08-21 21:22:27,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:22:27,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:22:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:22:27,876 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand 6 states. [2020-08-21 21:22:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:29,162 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2020-08-21 21:22:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:22:29,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 21:22:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:29,176 INFO L225 Difference]: With dead ends: 410 [2020-08-21 21:22:29,177 INFO L226 Difference]: Without dead ends: 349 [2020-08-21 21:22:29,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:22:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-21 21:22:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 304. [2020-08-21 21:22:29,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 21:22:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-08-21 21:22:29,257 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 28 [2020-08-21 21:22:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:29,258 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-08-21 21:22:29,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:22:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-08-21 21:22:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 21:22:29,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:29,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:29,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:22:29,261 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash 439620198, now seen corresponding path program 1 times [2020-08-21 21:22:29,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:29,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547013073] [2020-08-21 21:22:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:29,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:29,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:29,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:29,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547013073] [2020-08-21 21:22:29,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:29,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:22:29,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594713306] [2020-08-21 21:22:29,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:22:29,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:29,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:22:29,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:22:29,469 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 6 states. [2020-08-21 21:22:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:30,300 INFO L93 Difference]: Finished difference Result 487 states and 647 transitions. [2020-08-21 21:22:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:22:30,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 21:22:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:30,307 INFO L225 Difference]: With dead ends: 487 [2020-08-21 21:22:30,307 INFO L226 Difference]: Without dead ends: 368 [2020-08-21 21:22:30,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:22:30,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-21 21:22:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2020-08-21 21:22:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-21 21:22:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 466 transitions. [2020-08-21 21:22:30,357 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 466 transitions. Word has length 28 [2020-08-21 21:22:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:30,359 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 466 transitions. [2020-08-21 21:22:30,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:22:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 466 transitions. [2020-08-21 21:22:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 21:22:30,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:30,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:30,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:22:30,369 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1607848921, now seen corresponding path program 1 times [2020-08-21 21:22:30,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:30,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035429435] [2020-08-21 21:22:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:30,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:30,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:30,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:30,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035429435] [2020-08-21 21:22:30,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:30,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:22:30,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086912367] [2020-08-21 21:22:30,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:22:30,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:30,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:22:30,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:22:30,595 INFO L87 Difference]: Start difference. First operand 344 states and 466 transitions. Second operand 6 states. [2020-08-21 21:22:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:31,400 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2020-08-21 21:22:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:22:31,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-21 21:22:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:31,403 INFO L225 Difference]: With dead ends: 347 [2020-08-21 21:22:31,404 INFO L226 Difference]: Without dead ends: 343 [2020-08-21 21:22:31,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:22:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-08-21 21:22:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2020-08-21 21:22:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-21 21:22:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 463 transitions. [2020-08-21 21:22:31,429 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 463 transitions. Word has length 38 [2020-08-21 21:22:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:31,430 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 463 transitions. [2020-08-21 21:22:31,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:22:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 463 transitions. [2020-08-21 21:22:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 21:22:31,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:31,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:31,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:22:31,433 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:31,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1742109340, now seen corresponding path program 1 times [2020-08-21 21:22:31,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:31,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184269246] [2020-08-21 21:22:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:31,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:31,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:31,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 21:22:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:31,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184269246] [2020-08-21 21:22:31,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:31,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:22:31,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064328081] [2020-08-21 21:22:31,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:22:31,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:22:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:22:31,614 INFO L87 Difference]: Start difference. First operand 343 states and 463 transitions. Second operand 8 states. [2020-08-21 21:22:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:32,686 INFO L93 Difference]: Finished difference Result 394 states and 520 transitions. [2020-08-21 21:22:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:22:32,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 21:22:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:32,689 INFO L225 Difference]: With dead ends: 394 [2020-08-21 21:22:32,689 INFO L226 Difference]: Without dead ends: 325 [2020-08-21 21:22:32,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:22:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-21 21:22:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2020-08-21 21:22:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 21:22:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 406 transitions. [2020-08-21 21:22:32,727 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 406 transitions. Word has length 46 [2020-08-21 21:22:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:32,730 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 406 transitions. [2020-08-21 21:22:32,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:22:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 406 transitions. [2020-08-21 21:22:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 21:22:32,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:32,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:32,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:22:32,732 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 750041855, now seen corresponding path program 1 times [2020-08-21 21:22:32,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:32,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209396251] [2020-08-21 21:22:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:32,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:32,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:32,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:32,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:22:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:32,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 21:22:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:32,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209396251] [2020-08-21 21:22:32,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:32,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:22:32,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131922665] [2020-08-21 21:22:32,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:22:32,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:32,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:22:32,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:22:32,999 INFO L87 Difference]: Start difference. First operand 304 states and 406 transitions. Second operand 8 states. [2020-08-21 21:22:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:33,531 INFO L93 Difference]: Finished difference Result 316 states and 421 transitions. [2020-08-21 21:22:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:22:33,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-21 21:22:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:33,535 INFO L225 Difference]: With dead ends: 316 [2020-08-21 21:22:33,535 INFO L226 Difference]: Without dead ends: 300 [2020-08-21 21:22:33,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:22:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-21 21:22:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-08-21 21:22:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-21 21:22:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2020-08-21 21:22:33,564 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 364 transitions. Word has length 45 [2020-08-21 21:22:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:33,564 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 364 transitions. [2020-08-21 21:22:33,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:22:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 364 transitions. [2020-08-21 21:22:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 21:22:33,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:33,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:33,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:22:33,567 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1784783245, now seen corresponding path program 1 times [2020-08-21 21:22:33,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:33,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843503743] [2020-08-21 21:22:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:33,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:33,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:33,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:33,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:22:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:33,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 21:22:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:33,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843503743] [2020-08-21 21:22:33,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:33,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:22:33,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74076144] [2020-08-21 21:22:33,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:22:33,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:22:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:22:33,790 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 8 states. [2020-08-21 21:22:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:34,712 INFO L93 Difference]: Finished difference Result 290 states and 385 transitions. [2020-08-21 21:22:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:22:34,712 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-21 21:22:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:34,715 INFO L225 Difference]: With dead ends: 290 [2020-08-21 21:22:34,715 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 21:22:34,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:22:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 21:22:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-08-21 21:22:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-21 21:22:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 321 transitions. [2020-08-21 21:22:34,739 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 321 transitions. Word has length 46 [2020-08-21 21:22:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:34,740 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 321 transitions. [2020-08-21 21:22:34,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:22:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 321 transitions. [2020-08-21 21:22:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:22:34,746 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:34,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:34,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:22:34,747 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1852297644, now seen corresponding path program 1 times [2020-08-21 21:22:34,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:34,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577435900] [2020-08-21 21:22:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:34,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:34,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:34,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:34,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:22:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:34,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:34,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 21:22:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:34,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577435900] [2020-08-21 21:22:34,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:34,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:22:34,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355833136] [2020-08-21 21:22:34,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:22:34,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:34,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:22:34,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:22:34,950 INFO L87 Difference]: Start difference. First operand 242 states and 321 transitions. Second operand 8 states. [2020-08-21 21:22:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:35,575 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2020-08-21 21:22:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:22:35,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-21 21:22:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:35,578 INFO L225 Difference]: With dead ends: 270 [2020-08-21 21:22:35,578 INFO L226 Difference]: Without dead ends: 240 [2020-08-21 21:22:35,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:22:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-21 21:22:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-08-21 21:22:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 21:22:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 317 transitions. [2020-08-21 21:22:35,595 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 317 transitions. Word has length 53 [2020-08-21 21:22:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:35,596 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 317 transitions. [2020-08-21 21:22:35,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:22:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 317 transitions. [2020-08-21 21:22:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 21:22:35,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:35,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:35,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:22:35,598 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:35,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1745163498, now seen corresponding path program 1 times [2020-08-21 21:22:35,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:35,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577185429] [2020-08-21 21:22:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 21:22:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:35,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577185429] [2020-08-21 21:22:35,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:35,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:22:35,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429531994] [2020-08-21 21:22:35,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:22:35,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:22:35,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:22:35,819 INFO L87 Difference]: Start difference. First operand 240 states and 317 transitions. Second operand 9 states. [2020-08-21 21:22:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,235 INFO L93 Difference]: Finished difference Result 313 states and 400 transitions. [2020-08-21 21:22:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:22:37,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-21 21:22:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,239 INFO L225 Difference]: With dead ends: 313 [2020-08-21 21:22:37,239 INFO L226 Difference]: Without dead ends: 307 [2020-08-21 21:22:37,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:22:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-21 21:22:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 274. [2020-08-21 21:22:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-08-21 21:22:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 356 transitions. [2020-08-21 21:22:37,262 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 356 transitions. Word has length 51 [2020-08-21 21:22:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,262 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 356 transitions. [2020-08-21 21:22:37,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:22:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 356 transitions. [2020-08-21 21:22:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 21:22:37,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:37,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:22:37,264 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash -855964733, now seen corresponding path program 1 times [2020-08-21 21:22:37,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786289706] [2020-08-21 21:22:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 21:22:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:37,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786289706] [2020-08-21 21:22:37,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 21:22:37,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263214133] [2020-08-21 21:22:37,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:22:37,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:22:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:22:37,500 INFO L87 Difference]: Start difference. First operand 274 states and 356 transitions. Second operand 13 states. [2020-08-21 21:22:37,781 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-08-21 21:22:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:39,635 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2020-08-21 21:22:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:22:39,636 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-08-21 21:22:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:39,639 INFO L225 Difference]: With dead ends: 325 [2020-08-21 21:22:39,639 INFO L226 Difference]: Without dead ends: 284 [2020-08-21 21:22:39,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-08-21 21:22:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-21 21:22:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2020-08-21 21:22:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-21 21:22:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 315 transitions. [2020-08-21 21:22:39,682 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 315 transitions. Word has length 52 [2020-08-21 21:22:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:39,682 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 315 transitions. [2020-08-21 21:22:39,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:22:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 315 transitions. [2020-08-21 21:22:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:22:39,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:39,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:39,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:22:39,685 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash 240184037, now seen corresponding path program 1 times [2020-08-21 21:22:39,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:39,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584529892] [2020-08-21 21:22:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 21:22:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:39,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584529892] [2020-08-21 21:22:39,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 21:22:39,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442834102] [2020-08-21 21:22:39,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:22:39,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:22:39,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:22:39,998 INFO L87 Difference]: Start difference. First operand 240 states and 315 transitions. Second operand 12 states. [2020-08-21 21:22:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:41,189 INFO L93 Difference]: Finished difference Result 252 states and 327 transitions. [2020-08-21 21:22:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:22:41,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-08-21 21:22:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:41,192 INFO L225 Difference]: With dead ends: 252 [2020-08-21 21:22:41,192 INFO L226 Difference]: Without dead ends: 211 [2020-08-21 21:22:41,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:22:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-21 21:22:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-08-21 21:22:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 21:22:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 21:22:41,214 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 53 [2020-08-21 21:22:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:41,215 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 21:22:41,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:22:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 21:22:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 21:22:41,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:41,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:41,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:22:41,217 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1569125, now seen corresponding path program 1 times [2020-08-21 21:22:41,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:41,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393290163] [2020-08-21 21:22:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 21:22:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:41,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393290163] [2020-08-21 21:22:41,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:41,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 21:22:41,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637646067] [2020-08-21 21:22:41,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:22:41,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:41,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:22:41,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:22:41,492 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 14 states. [2020-08-21 21:22:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:42,680 INFO L93 Difference]: Finished difference Result 227 states and 292 transitions. [2020-08-21 21:22:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:22:42,681 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-21 21:22:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:42,682 INFO L225 Difference]: With dead ends: 227 [2020-08-21 21:22:42,682 INFO L226 Difference]: Without dead ends: 206 [2020-08-21 21:22:42,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:22:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-21 21:22:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-21 21:22:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-21 21:22:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-08-21 21:22:42,716 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 54 [2020-08-21 21:22:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:42,719 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-08-21 21:22:42,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:22:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-08-21 21:22:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:22:42,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:42,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:42,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:22:42,721 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1204113239, now seen corresponding path program 1 times [2020-08-21 21:22:42,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:42,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615344822] [2020-08-21 21:22:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 21:22:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:42,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615344822] [2020-08-21 21:22:42,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:42,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 21:22:42,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931731848] [2020-08-21 21:22:42,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:22:42,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:22:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:22:42,965 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 11 states. [2020-08-21 21:22:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:43,843 INFO L93 Difference]: Finished difference Result 296 states and 379 transitions. [2020-08-21 21:22:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:22:43,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 21:22:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:43,845 INFO L225 Difference]: With dead ends: 296 [2020-08-21 21:22:43,846 INFO L226 Difference]: Without dead ends: 224 [2020-08-21 21:22:43,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:22:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-08-21 21:22:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-08-21 21:22:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 21:22:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 278 transitions. [2020-08-21 21:22:43,876 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 278 transitions. Word has length 57 [2020-08-21 21:22:43,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:43,877 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 278 transitions. [2020-08-21 21:22:43,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:22:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 278 transitions. [2020-08-21 21:22:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:22:43,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:43,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:43,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:22:43,882 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:43,882 INFO L82 PathProgramCache]: Analyzing trace with hash -527681510, now seen corresponding path program 1 times [2020-08-21 21:22:43,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:43,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286720706] [2020-08-21 21:22:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:43,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:44,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:44,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:44,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 21:22:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:44,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:44,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:44,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286720706] [2020-08-21 21:22:44,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:44,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 21:22:44,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972665734] [2020-08-21 21:22:44,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:22:44,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:22:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:22:44,107 INFO L87 Difference]: Start difference. First operand 214 states and 278 transitions. Second operand 11 states. [2020-08-21 21:22:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:45,038 INFO L93 Difference]: Finished difference Result 232 states and 299 transitions. [2020-08-21 21:22:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:22:45,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-08-21 21:22:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:45,041 INFO L225 Difference]: With dead ends: 232 [2020-08-21 21:22:45,041 INFO L226 Difference]: Without dead ends: 225 [2020-08-21 21:22:45,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-08-21 21:22:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-21 21:22:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-08-21 21:22:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 21:22:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2020-08-21 21:22:45,059 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 57 [2020-08-21 21:22:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:45,059 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2020-08-21 21:22:45,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:22:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2020-08-21 21:22:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 21:22:45,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:45,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:45,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:22:45,061 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:45,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1045578754, now seen corresponding path program 1 times [2020-08-21 21:22:45,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:45,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042909118] [2020-08-21 21:22:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:45,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:45,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:45,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:45,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:22:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:45,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 21:22:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:45,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:22:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:45,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042909118] [2020-08-21 21:22:45,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:45,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:22:45,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729141400] [2020-08-21 21:22:45,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:22:45,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:22:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:22:45,355 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand 8 states. [2020-08-21 21:22:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:46,115 INFO L93 Difference]: Finished difference Result 258 states and 327 transitions. [2020-08-21 21:22:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:22:46,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-08-21 21:22:46,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:46,117 INFO L225 Difference]: With dead ends: 258 [2020-08-21 21:22:46,118 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 21:22:46,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:22:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 21:22:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-08-21 21:22:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-21 21:22:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 274 transitions. [2020-08-21 21:22:46,143 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 274 transitions. Word has length 60 [2020-08-21 21:22:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:46,143 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 274 transitions. [2020-08-21 21:22:46,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:22:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 274 transitions. [2020-08-21 21:22:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 21:22:46,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:46,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:46,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:22:46,145 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:46,145 INFO L82 PathProgramCache]: Analyzing trace with hash -930292561, now seen corresponding path program 1 times [2020-08-21 21:22:46,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:46,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584303650] [2020-08-21 21:22:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:22:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:22:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:22:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:46,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584303650] [2020-08-21 21:22:46,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:46,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 21:22:46,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728199101] [2020-08-21 21:22:46,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 21:22:46,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 21:22:46,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:22:46,501 INFO L87 Difference]: Start difference. First operand 214 states and 274 transitions. Second operand 15 states. [2020-08-21 21:22:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,926 INFO L93 Difference]: Finished difference Result 226 states and 286 transitions. [2020-08-21 21:22:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:22:47,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-21 21:22:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,929 INFO L225 Difference]: With dead ends: 226 [2020-08-21 21:22:47,929 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 21:22:47,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:22:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 21:22:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-08-21 21:22:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 21:22:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2020-08-21 21:22:47,945 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 61 [2020-08-21 21:22:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,946 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2020-08-21 21:22:47,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 21:22:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2020-08-21 21:22:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 21:22:47,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:22:47,948 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1127735086, now seen corresponding path program 1 times [2020-08-21 21:22:47,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848816342] [2020-08-21 21:22:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:22:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 21:22:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:22:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:48,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848816342] [2020-08-21 21:22:48,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:48,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 21:22:48,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162084984] [2020-08-21 21:22:48,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 21:22:48,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 21:22:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:22:48,261 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand 15 states. [2020-08-21 21:22:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:49,102 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-08-21 21:22:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:22:49,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-08-21 21:22:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:49,105 INFO L225 Difference]: With dead ends: 200 [2020-08-21 21:22:49,105 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 21:22:49,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:22:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 21:22:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-08-21 21:22:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 21:22:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2020-08-21 21:22:49,129 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 56 [2020-08-21 21:22:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:49,130 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2020-08-21 21:22:49,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 21:22:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2020-08-21 21:22:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 21:22:49,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:49,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:49,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 21:22:49,131 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1554463583, now seen corresponding path program 1 times [2020-08-21 21:22:49,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:49,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342214657] [2020-08-21 21:22:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 21:22:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 21:22:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:49,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342214657] [2020-08-21 21:22:49,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:49,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 21:22:49,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677096727] [2020-08-21 21:22:49,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:22:49,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:22:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:22:49,409 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand 13 states. [2020-08-21 21:22:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:50,597 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2020-08-21 21:22:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:22:50,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-21 21:22:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:50,600 INFO L225 Difference]: With dead ends: 237 [2020-08-21 21:22:50,601 INFO L226 Difference]: Without dead ends: 220 [2020-08-21 21:22:50,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-08-21 21:22:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-21 21:22:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-08-21 21:22:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-21 21:22:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 237 transitions. [2020-08-21 21:22:50,617 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 237 transitions. Word has length 55 [2020-08-21 21:22:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:50,617 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 237 transitions. [2020-08-21 21:22:50,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:22:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 237 transitions. [2020-08-21 21:22:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 21:22:50,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:50,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:50,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 21:22:50,619 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:50,620 INFO L82 PathProgramCache]: Analyzing trace with hash -725184292, now seen corresponding path program 1 times [2020-08-21 21:22:50,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:50,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099170840] [2020-08-21 21:22:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:50,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:50,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:50,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 21:22:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:50,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 21:22:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:50,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099170840] [2020-08-21 21:22:50,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:50,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 21:22:50,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884555901] [2020-08-21 21:22:50,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:22:50,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:22:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:22:50,854 INFO L87 Difference]: Start difference. First operand 190 states and 237 transitions. Second operand 14 states. [2020-08-21 21:22:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:51,813 INFO L93 Difference]: Finished difference Result 206 states and 253 transitions. [2020-08-21 21:22:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:22:51,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-21 21:22:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:51,815 INFO L225 Difference]: With dead ends: 206 [2020-08-21 21:22:51,815 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 21:22:51,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:22:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 21:22:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-08-21 21:22:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 21:22:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2020-08-21 21:22:51,832 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 55 [2020-08-21 21:22:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:51,832 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2020-08-21 21:22:51,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:22:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2020-08-21 21:22:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 21:22:51,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:51,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:51,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 21:22:51,834 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash -639520605, now seen corresponding path program 1 times [2020-08-21 21:22:51,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:51,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391111911] [2020-08-21 21:22:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:22:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:22:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:51,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 21:22:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:22:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:22:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:52,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391111911] [2020-08-21 21:22:52,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:52,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 21:22:52,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299555259] [2020-08-21 21:22:52,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:22:52,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:22:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:22:52,071 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 10 states. [2020-08-21 21:22:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:52,409 INFO L93 Difference]: Finished difference Result 204 states and 235 transitions. [2020-08-21 21:22:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:22:52,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-08-21 21:22:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:52,411 INFO L225 Difference]: With dead ends: 204 [2020-08-21 21:22:52,411 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 21:22:52,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:22:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 21:22:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-21 21:22:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 21:22:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-08-21 21:22:52,425 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 58 [2020-08-21 21:22:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:52,426 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-08-21 21:22:52,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:22:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-08-21 21:22:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 21:22:52,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:52,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:52,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 21:22:52,427 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1656625880, now seen corresponding path program 1 times [2020-08-21 21:22:52,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:52,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193615763] [2020-08-21 21:22:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:22:52,463 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:22:52,463 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:22:52,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 21:22:52,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:22:52 BoogieIcfgContainer [2020-08-21 21:22:52,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:22:52,514 INFO L168 Benchmark]: Toolchain (without parser) took 28371.18 ms. Allocated memory was 139.5 MB in the beginning and 528.0 MB in the end (delta: 388.5 MB). Free memory was 102.0 MB in the beginning and 388.7 MB in the end (delta: -286.7 MB). Peak memory consumption was 101.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:52,515 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:22:52,515 INFO L168 Benchmark]: CACSL2BoogieTranslator took 593.76 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 174.1 MB in the end (delta: -72.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:52,516 INFO L168 Benchmark]: Boogie Preprocessor took 83.58 ms. Allocated memory is still 202.4 MB. Free memory was 174.1 MB in the beginning and 170.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:52,516 INFO L168 Benchmark]: RCFGBuilder took 961.53 ms. Allocated memory is still 202.4 MB. Free memory was 170.6 MB in the beginning and 99.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:52,517 INFO L168 Benchmark]: TraceAbstraction took 26727.28 ms. Allocated memory was 202.4 MB in the beginning and 528.0 MB in the end (delta: 325.6 MB). Free memory was 99.0 MB in the beginning and 388.7 MB in the end (delta: -289.7 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:52,519 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 593.76 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 174.1 MB in the end (delta: -72.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.58 ms. Allocated memory is still 202.4 MB. Free memory was 174.1 MB in the beginning and 170.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 961.53 ms. Allocated memory is still 202.4 MB. Free memory was 170.6 MB in the beginning and 99.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26727.28 ms. Allocated memory was 202.4 MB in the beginning and 528.0 MB in the end (delta: 325.6 MB). Free memory was 99.0 MB in the beginning and 388.7 MB in the end (delta: -289.7 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1011]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int KernelMode ; [L22] int Executive ; [L23] int DevicePowerState ; [L24] int s ; [L25] int UNLOADED ; [L26] int NP ; [L27] int DC ; [L28] int SKIP1 ; [L29] int SKIP2 ; [L30] int MPR1 ; [L31] int MPR3 ; [L32] int IPC ; [L33] int pended ; [L34] int compFptr ; [L35] int compRegistered ; [L36] int lowerDriverReturn ; [L37] int setEventCalled ; [L38] int customIrp ; [L39] int myStatus ; [L292] int status ; [L293] int irp = __VERIFIER_nondet_int() ; [L294] int pirp ; [L295] int pirp__IoStatus__Status ; [L296] int irp_choice = __VERIFIER_nondet_int() ; [L297] int devobj = __VERIFIER_nondet_int() ; [L298] int __cil_tmp8 ; [L300] KernelMode = 0 [L301] Executive = 0 [L302] DevicePowerState = 1 [L303] s = 0 [L304] UNLOADED = 0 [L305] NP = 0 [L306] DC = 0 [L307] SKIP1 = 0 [L308] SKIP2 = 0 [L309] MPR1 = 0 [L310] MPR3 = 0 [L311] IPC = 0 [L312] pended = 0 [L313] compFptr = 0 [L314] compRegistered = 0 [L315] lowerDriverReturn = 0 [L316] setEventCalled = 0 [L317] customIrp = 0 [L318] myStatus = 0 [L322] status = 0 [L323] pirp = irp [L324] CALL _BLAST_init() [L59] UNLOADED = 0 [L60] NP = 1 [L61] DC = 2 [L62] SKIP1 = 3 [L63] SKIP2 = 4 [L64] MPR1 = 5 [L65] MPR3 = 6 [L66] IPC = 7 [L67] s = UNLOADED [L68] pended = 0 [L69] compFptr = 0 [L70] compRegistered = 0 [L71] lowerDriverReturn = 0 [L72] setEventCalled = 0 [L73] customIrp = 0 [L324] RET _BLAST_init() [L326] COND TRUE status >= 0 [L327] s = NP [L328] customIrp = 0 [L329] setEventCalled = customIrp [L330] lowerDriverReturn = setEventCalled [L331] compRegistered = lowerDriverReturn [L332] pended = compRegistered [L333] pirp__IoStatus__Status = 0 [L334] myStatus = 0 [L335] COND FALSE !(irp_choice == 0) [L340] CALL stub_driver_init() [L45] s = NP [L46] pended = 0 [L47] compFptr = 0 [L48] compRegistered = 0 [L49] lowerDriverReturn = 0 [L50] setEventCalled = 0 [L51] customIrp = 0 [L340] RET stub_driver_init() [L343] COND FALSE !(status < 0) [L347] int tmp_ndt_1; [L348] tmp_ndt_1 = __VERIFIER_nondet_int() [L349] COND FALSE !(tmp_ndt_1 == 0) [L352] int tmp_ndt_2; [L353] tmp_ndt_2 = __VERIFIER_nondet_int() [L354] COND FALSE !(tmp_ndt_2 == 1) [L357] int tmp_ndt_3; [L358] tmp_ndt_3 = __VERIFIER_nondet_int() [L359] COND TRUE tmp_ndt_3 == 3 [L386] CALL, EXPR KbFilter_PnP(devobj, pirp) [L78] int devExt ; [L79] int irpStack ; [L80] int status ; [L81] int event = __VERIFIER_nondet_int() ; [L82] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L83] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L84] int irpStack__MinorFunction = __VERIFIER_nondet_int() ; [L85] int devExt__TopOfStack = __VERIFIER_nondet_int() ; [L86] int devExt__Started ; [L87] int devExt__Removed ; [L88] int devExt__SurpriseRemoved ; [L89] int Irp__IoStatus__Status ; [L90] int Irp__IoStatus__Information ; [L91] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L92] int irpSp ; [L93] int nextIrpSp ; [L94] int nextIrpSp__Control ; [L95] int irpSp___0 ; [L96] int irpSp__Context ; [L97] int irpSp__Control ; [L98] long __cil_tmp23 ; [L101] status = 0 [L102] devExt = DeviceObject__DeviceExtension [L103] irpStack = Irp__Tail__Overlay__CurrentStackLocation [L104] COND FALSE !(irpStack__MinorFunction == 0) [L107] COND FALSE !(irpStack__MinorFunction == 23) [L110] COND TRUE irpStack__MinorFunction == 2 [L234] devExt__Removed = 1 [L235] COND TRUE s == NP [L236] s = SKIP1 [L243] Irp__CurrentLocation ++ [L244] Irp__Tail__Overlay__CurrentStackLocation ++ [L245] CALL IofCallDriver(devExt__TopOfStack, Irp) [L481] int returnVal2 ; [L482] int compRetStatus ; [L483] int lcontext = __VERIFIER_nondet_int() ; [L484] long long __cil_tmp7 ; [L487] COND FALSE !(\read(compRegistered)) [L500] int tmp_ndt_6; [L501] tmp_ndt_6 = __VERIFIER_nondet_int() [L502] COND FALSE !(tmp_ndt_6 == 0) [L505] int tmp_ndt_7; [L506] tmp_ndt_7 = __VERIFIER_nondet_int() [L507] COND TRUE tmp_ndt_7 == 1 [L516] returnVal2 = -1073741823 [L526] COND FALSE !(s == NP) [L530] COND FALSE !(s == MPR1) [L539] COND TRUE s == SKIP1 [L540] s = SKIP2 [L541] lowerDriverReturn = returnVal2 [L549] return (returnVal2); [L245] RET IofCallDriver(devExt__TopOfStack, Irp) [L246] status = 0 [L288] return (status); [L386] RET, EXPR KbFilter_PnP(devobj, pirp) [L386] status = KbFilter_PnP(devobj, pirp) [L410] COND FALSE !(pended == 1) [L418] COND FALSE !(pended == 1) [L426] COND TRUE s != UNLOADED [L427] COND TRUE status != -1 [L428] COND FALSE !(s != SKIP2) [L438] COND FALSE !(pended == 1) [L445] COND FALSE !(s == DC) [L450] COND TRUE status != lowerDriverReturn [L451] CALL errorFn() [L1011] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 18 procedures, 240 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.6s, OverallIterations: 21, TraceHistogramMax: 1, AutomataDifference: 20.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4629 SDtfs, 6125 SDslu, 7818 SDs, 0 SdLazy, 16028 SolverSat, 1270 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 275 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 1029 NumberOfCodeBlocks, 1029 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 953 ConstructedInterpolants, 0 QuantifiedInterpolants, 212124 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...